Can you tell which of these tech company mission statements are real?

One of the curious things about the current Silicon Valley mindset is that every startup and business out there, no matter how prosaic, has taken on a duty to change the world. File-storage companies are reinventing work; online shops are disrupting economics.

There's a lot of upside to mission-driven companies — they make for great places to work, and their founders often care passionately about making a real difference. But they sure do spout a lot of guff in the process.

We've trawled through the S-1 filings (documents businesses prepare when they sell shares to the public) of some of the biggest tech companies around to come up with our favorite examples — from workplace credos fortified with soaring rhetoric to grandiloquent corporatespeak projected through a visionary lens.

Keep reading and see if you can tell which ones are real and which are fake.